<template>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="item in list" :key="item.id" >
            <td> {{item.id}} </td>
            <td> {{item.name}} </td>
            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{red:item.price>100}"> {{item.price}} </td>
            <td> {{formDate(item.time)}} </td>
            <td><a href="#" @click.prevent="del(item.id)" >删除</a></td>
          </tr>
        </tbody>
          
        <tfoot v-if="list.length==0" >
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
           
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input v-model.trim="name"
              type="text"
              class="form-control"
              placeholder="资产名称"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input v-model.trim.number="price"
              type="text"
              class="form-control"
              placeholder="价格"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button @click.prevent="add" class="btn btn-primary">添加资产</button>
      </form>
    </div>
  </div>
</template>

<script>
import moment from "moment"
export default {
  data() {
    return {
      name: "", // 名称
      price: 0, // 价格
      list: [
        { id: 100, name: "外套", price: 199, time: new Date('2010-08-12')},
        { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
        { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
        { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
      ],
    }
  },
  methods:{
    add(){
      let id = this.list.length==0 ? '100': this.list[this.list.length-1].id+1
      if(this.name == "" ||this.price<=0) return alert("请正确输入")
      this.list.push({
        id,
        name:this.name,
        price:this.price,
        time:new Date()
      })
      this.name=''
      this.price=0
    },
    del(id){
      this.list.forEach((item,index,arr)=>{
        if(item.id==id){
          this.list.splice(index,1)
        }
      })
    },
    formDate(time){
      return moment(time).format("YYYY-MM-DD : HH:mm:ss")
    }
  }

};
</script>

<style >
.red{
  color: red;
}
</style>
